Sunday 5 June 2016

Networking

Now a days in our routine life we come across various types of networks like network of roads. communication network of telephone system network of banks, radio networks, television networks, library networks, etc.,

What is networking?

The computer network is a group of two or more computers connected to each other electronically. This means that computers can talk and share the information to each other.

Advantages of Networking:

Networking in computers brings efficiency, economy and effectiveness in any organization.

Preserving Information:- It is difficult to maintain regular backups on a number of stand alone computers. When you keep backups on a central location, you have one place to look for the lost information.

Reduction of Hardware costs:- in the network, the hardware devices which are not used very often, like modems, printers, scanners, CD devices etc., can be shared. This reduces the cost of hardware.

Quick Document Delivery:- Internet provides a facility to instantly deliver soft copies from one computer to other computers throughout the world.

Efficent Use of Storage Media:- It s better to sotre a shareable application data on a network drive than to store a copy of the application on eacch user's storage device. it is better to have one big hard disk in the server than to have small hard disks in different computers.

Efficiency:- In a network, the deletion, modification or upgradation of the software or data is to be done at a single point only. This brings more efficiency and effectiveness into working system.

Redundancy:- Networks reduce the need for hard copies of all documents. By sharing files over the network, the need to share paper copies of reports or any other information can be eliminated or greatly reduced.

A computer network can be categorized depending on geographical area as;-

  1. LAN (Local Area Network)
  2. MAN (Metropolitan Area Network)
  3. WAN (Wide Area Network)
1. LAN - A network is said to be Local Area Network if it is confined relatively to a small area It is generally limited to a building or a geographical area, expanding not more than a mile apart to other computers.

2. MAN - Metropolitan Area Network covers larger geographic areas, such as cities. Often used by local libraries and government agencies to connect t citizens and private industries.

3.WAN - Wide Area Networks connect larger geographic areas, such as London, the UK or the world. In this type of network, dedicated transoceanic cabling or satellite uplinks may be used.

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